Scene rendering time varies in Blender based on scene complexity, resolution, and hardware. So, here is how render times are influenced and how to benchmark them.
Things That Impact Render Times
Scene Complexity: Using high-poly models, advanced materials or textures will ramp up render times exponentially. And simulations like fluids, smoke and particles render slower as well.
Lighting and Render Engine: Blender has two rendering engines: Eevee, which is real-time but less accurate, and Cycles, a ray-tracing engine that tends to be more precise (but slower). Note: If Cycles is being used, the render times will be increased depending on how many light bounces or reflections are involved.
Resolution and Samples: In general, more resolution (4K vs to HD) and sample means longer the render. More samples less noise but longer render time.
Hardware: The fastest way of rendering in most cases is through GPU. Use a powerful graphics card (NVIDIA RTX series) to expedite render times. As well as this, consider utilizing a render farm like ours to benefit from far greater parallel processing with GPUs and CPUs.
Estimating Render Time
An HD frame in Cycles, takes 5 to 20 minutes per frame to render (500 sample) on a normal system with little complexity.
For animations (24fps for 10 seconds = 240 frames): Render time per frame * Number of Frames
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